Choosing Anti-Virus Software
There are a number of companies that provide software solutions to virus, Trojan, and internet worm attacks. It can be really confusing when you compare three different software packages from five different companies trying to find the one that is right for you. With that in mind, there are several very important things that you need to consider when choosing antivirus software: 1) How often/fast are the virus definitions updated. You want the answer to be “As soon as a new threat is found”. 2) Are the virus definitions updated automatically by the software? You want the answer to be “YES”. 3) Can you configure the software to check for updates every time you go online? You want the answer to be “YES”. 4) Is the software “smart” so that it can find viruses it doesn’t even know about yet? You want the answer to be “YES”. 5) Can it scan incoming and outgoing email automatically? You want the answer to be “YES”. 6) Can you configure it once to perform automatic scans of your entire computer on a regular schedule? You want the answer to be “YES”. 7) Does it provide a way to ‘clean out’ any viruses etc. that are found? You want the answer to be “YES”. Are upgrades to the software package performed automatically, regularly, and at no cost? You want the answer to be “YES”. There are a few major players in the field that you should know about in order to make an informed decision about which antivirus software solution to buy and use. There are Norton Antivirus, Trend Micro’s PC-cillin, and McAfee Antivirus. Sophos and Grisoft?s AVG are also very god choices. All of the top antivirus solutions will provide each of the eight points above (and more). There are quite a few smaller players on the market as well. In many cases they are quite good. However, most of the smaller players in this market don’t have the resources (yet) to keep up with constantly changing virus threats. For now I would recommend staying away from them. Not because they are poor products, but simply because they aren’t able to consistently provide each of the eight requirements above. The first few days after a new virus appears are often when it can do the most damage. The sooner you get an update the better. The big 3 will provide automatic updates to new threats usually within days of a new virus being found. Sophos and AVG are similar. Smaller players may take several days to provide updates, which are often not automatic. This should be enough basic information to help you on your way to choosing a good antivirus software. If you?d like to learn more first, there is plenty to read at http://www.antivirus-report.com/antivirus-software.html Learn about <a href="http://www.antivirus-report.com/antivirus-software.html">antivirus software</a> & how to protect your pc against trojan horses, spyware, computer viruses, etc. in the future. <a href="http://www.antivirus-report.com/nortons-anti-virus.html">Nortons anti virus</a>
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FTP Servers and Security - Three methods that Secure FTP Servers use
FTP (File Transfer Protocol) has been the basis for file transfer since the dawn of the internet. The truly remarkable feature about FTP was that it was operating system independent. Files could be smoothly transferred between Unix, Windows and any other operating system. The other cool feature about FTP was that a simple validation mechanism consisting of a username and a password could be used to limit access to files. However, the actual data itself was transferred unencrypted and it was easy to intercept and listen in on an FTP connection. The internet itself had very minimal security built into it. Consisting of many smaller independent networks that stretched across the globe, the path that a data packet took to get from point A to point B was unpredictable. With the popularity of the internet, it became essential to be able to transmit many types of critical data with some amount of security. Netscape Communications solved the security problem on the internet by developing the Secure Sockets Layer Protocol (SSL) which used public key cryptography to encrypt data transmitted over the internet. This is still the widely accepted security mechanism and is implemented by all web browsers. FTPS Secure File Transfer Modifications to the FTP protocol were proposed to incorporate the use of SSL for encrypting file transfers over the internet. The modified mechanism is referred to as FTPS. In order to maintain backwards compatibility with the original file transfer protocol, an FTPS connection could either be explicit, where the connection between the client connection and the server starts out as regular FTP and then negotiates a secure connection, or implicit where the connection starts out being encrypted. HTTPS Secure File Transfer Since a web browser is already capable of public key cryptography, simple downloads and uploads can be performed directly through a web browser using the HTTPS protocol. This means that special FTP Client software is not required. SFTP Secure File Transfer The Secure Shell protocol also known as SSH was developed by Tatu Ylonen to enable secure access to remote shells using public key cryptography and replace Telnet and other non secure shells. This protocol has since evolved to also support a file transfer mechanism known as SFTP. The main advantage of this mechanism is that it did not require the opening of an additional data channel connection for transferring files. All of these three methods of secure file transfer are based on public key cryptography and all of them are equally capable of securing the transfer of critical files across the internet. The only drawback of these methods is that there is a data overhead associated with encrypting files. There is also a performance overhead associated with encrypting the files at the source and decrypting them at the destination. Because of this, system administrators sometimes use regular FTP for file transfers within a secured internal network. However, for transferring files over the internet, this is a small price to pay in exchange for the guarantee that sensitive files reach their destination without being intercepted or tampered with.Okay, you now know about the three types of secure ftp servers. If you are looking for a secure FTP server to run on your windows system that can support all three secure file transfer mechanisms, be sure to visit <a href ="http://www.sysax.com/">http://www.sysax.com/</a> and download <a href ="http://www.sysax.com/download.htm?c=48#sysaxserv">Sysax FTP Server</a>
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